Poor customer service

On Wednesday 25/07/2018, myself and 2 of my friends went to purchase 3 meals at KFC Zevenwacht Mall. Our order was taken at 20:11 and after 30 minutes of waiting we asked one of the staff members what the delay was with our food. They couldn't tell us at that moment and we also noticed that there no manager visible for the 30 minute period. We then requested to see the manager (who seemed quite inexperienced ) on duty because we couldn't get the answers that we were looking for. He couldn't tell us how long our food was still going to take and disappeared again thereafter. Any competent manager would inform any customers of any delays which he failed to do. We eventually got our food at 20:56, we specifically asked for white sauce on 1 of the burgers, instead we received zinger sauce. They had to make a new burger with the white sauce that we requested which took another 5 minutes. On Thursday morning I spoke to Leverne from customer care where I laid my complaint not because of the delayed service but because of a hair that my friend found on his burger. I'm not sure of that was done deliberately because of the complaints we had or if it was due to an accident. Leverne advised me that I would receive a reference number via sms and a phone call from either the regional or area manager. Since then I have not received either. If this is the service that clients receive from KFC I would advise all customers to make use of other fast food restaurants. All 3 of us are managers in our respected fields and we know what is expected when customers experiences such poor service. This is completely unacceptable, I myself will never make use of KFC Zevenwacht ever again and neither will my friends. I don't think this complaint will make any difference but I feel that I had to express my disappointment.